Visually accessible assignments

I highly recommend bookmarking a color blindness simulator such as COBLIS. With it, you can simulate the effects of color blindness to see how accessible your color figures are. The geologic map of Pennsylvania to the left is relatively simple as geologic maps go, but still becomes much harder to interpret when simulated in various common forms of color blindness below.

While the best practice is to avoid color as a way of differentiating things in your teaching figures (consider using textures like stippling, or cross-hatching, etc.), color figures are a necessary evil in our field. It's extraordinarily time consuming to convert a complex figure like a geologic map to be color accessible, so often the best we can do is to make explicit the implicit norm of how common color blind unfriendly figures are in geology by telling your students at the start of a color-heavy assignment that the assignment is not very color-accessible, and they should feel comfortable asking for your assistance if they are having trouble reading the figures.